Originally Posted by Laurence
I have a 187-gallon acrylic aquarium with a 300 watt heater which does the job nicely, even in winter, since the tank is insulated with the panels. (Acrylic is also an insulator, incidentally.)
Two heaters would work, of course, but why waste the electricity if you can find a way to conserve it? To be on the safe side you can do both - add the additional heater and insulate at the same time.
I had the two heater setup in my tank... and then I got an in-line heater with my canister. How do people handle those? Do you then have another heater hanging on the back? I got the in line to avoid that. I hate having all the things hanging inside the tank.